Shock absorber



F. W. BULL SHOCK ABSORBER March 15,1927. 1,620,945

Filed May 17, 1926 Invenfar RWB 21 g WZ /m ed Mar. 15, 1927-, .v 19

' q ntree fisTAT E'S" PATENT: & ?r'l iein1;

rlmivx. WESLEY BULL, or OSHZAWA, eminent 1o, CANADA.

i SHOCK ABSORBER.

Apfilib'ation'filed May 17, 1926/ Serial No. 109;?51.

. My'inven-tion relates to improvements insupplemental'rece'sses 6 and 7 of tl'iefcast v shock absorbers of the" type disclosed in y ing 3; The opposite end of the sleeve =9 is prior, United" States Patent #1L,52T,115. provided with an annular flaiige 9 forfia dated February 17th, 1925; The object of pnrpose whicl'lwillhereinafterappear; 60 5 the present invention is to'devise in a shock 13 is an outer Cylindrical" casing provided absorber'of theabove type mean's for elimi-- With'an enlarged interi'orp'ortion 13 a n'd'a nating torsional strain on the interior parts, reduced interior portion l3 fOPH1iT1g a'slioi'11'- particularlythe compression spring, and at der13 j. I thesame time providingaclosed container 1 The sleeve 9*fits withinthe reduced pori- 10 for oil inwhich" all the operating parts tion 13, and the flange 9" thereof fits With v actuate, andit consists'essentially or the ar in the enlarged portion 18 [against the rangement and construction of parts as hereshoulder 1'3 llhe enlarged portion 1'3 is inafter more particularly explained. I provided with longitudinally extending ribs Fig. 1 is a side elevation of my device 14. is a sleeve provided with'external 7U 15 showing it applied lto aportion of a' chassis longitudinal} grooves 15 into which'the ribs frame and anax lez v 14 fit. The sleeve 15 is also-provided with a 2 is a perspective detailof my shock internal longitudinal grooves 1 5? the sleeve absorbing'mechanism. v 1 5" is slipp'edQinto the 'enlarged'porti'on =13 Fig. 3" is auperspective View of my device of the'" casing" 1 3 so that the ribs114e1'ite'r; looking. from-the opposite-side to that shown the-grooves-1 5 ,the sleeve 15 bearing*atiits i in' Figure '1 and showing. aporti'onnof a inneren'd-against theffiang'e' 9"] '1 h SS S frame by ted lines. 16 a eapmemberprovided)Withan'eX Figs. 4, 5, 6, 7 ,'8 and 9*a're' perspective views ternallythreaded portion lfi 'ffitt'ing the inv of the parts forming my shock absorbing ternally'" threaded portion l 'z -"of the'sl'eeve mechanism separated apart. 1 13. 18 is anyext ernally threadedcylinder,

1 "Fig. 10 is a. longitudinal sectional view' the' thread ofwh'ich engages with the interthrough-my device shown in the normalfpofna l thread oi -the? sleeve"9'. The threaded sition. l cylinder 18' 'isprovid'ed at its outer en'vd with Fig. 1 1 is a similar .view to Figure 10 a head 19 provided with peripheral tooth S5 showing 'the parts in the position they aslilieprojeetionsQOfittingwithi-nthe'grooves some whenabsorbing the shock. 1 15"of the'sleei 'e 1 5'. "21 is'a's 'a'ringbearing 12is a. sectional view "on line 121-2 at itsinner end againstthe -liead 'Igand at V Figure 11. v I its'outerend against the inner face of the 'fFig. 13 is "a sectionalview online' 13 -13 end wall of the eap 16*asf clearly. seen in Figure? 11, 1 p I Figures 10"and- 11 22' is a ha1f"pn'1ley I In the drawing like characters of refermember formed integralwith the casing 13. ence indicate corresponding parts each 23-isacable extending-around -thegroove figure." v 22* of the halfpulley 22*and" secured at a .l indicates a portion of a chassis 'frame, oneend tonsuch-'half'pulley member as'i'n- 95 40 andi 2 an axle of an automobile. 3 is a castdieated at 26 either by forming a head 25;a t ing which is cupped and provided with a the end of the cable 23"and compressingthe centre recess' i, a centre orifice 5' and supplelipsQG-around the cable to clinch-it in place mental recesses 6' and 7 extending from the or by any othersnitable means desired; The

recess 4 at diametrically opposite points. opposite end of'the e'ableisconnected to'the 4 Slis "a finger extendingyfrom the casting 3 axle 2 by 'meanssuch as ahook bo1t27 or p and beneath the chassis frame ill'ustrated by any other suitable means, Idonot deby dotted lines in Figure'3 so asto prevent scribe this construction in detail asanyform "the rotation "of the casting. 9is'an interofconne'ctionmay-be employed forconnectit na lly threaded sleeve provided at-its inner 'ing the cable 23 either to the front or rear end with a recess 10"andcentral orifice 11. axleof'anautomobile. a I

'12'is a bolt extendingthro'ugh theorifice'll Having described the principal parts in-' and'provided with a head 12"" fitting the vol ved in my invention I will briefly derecess 10.! .Theybiolt 12 extends through an 'scribethe operation ofthe same.

- orifice .1"' formed in the chassis frame 1.' Normally the spring21'be'ars against-the U0 i I 1O are projections formed integral with head 19 in the positionshown'in Fi ure 11.

the sleeve 9 and adapted to fit within the When the shock takes place the ten eney is,

for the chassis frame and axle to approach one another releasing the tension on the cable 23, the spring thereby forcing the threaded cylinder 18 further into the cylin- .22 is rotated in the opposite direction so thatthe externally threaded cylinder 18 is screwed out of the internally threaded cylinder'E) by means of the connection formed between the casing 13 and the head 19, the

head passing directly forward and the teeth sliding within the grooves 15 compressing the spring 21 until the shock is completely taken up, the spring then reacts to gradually take the parts back to their normal position.

It will, of course, be understood that the externally threaded cylinder 18 is non-revolvably connected to the cylinder 13 by means of the sleeve 15 which is in engagement with the cylinder 13 by means of the ribs 14 and grooves 15? and with the head 19 by means ofthe grooves 15 and teeth 20.

It will thus be seen that during the operation ofv the device the whole mechanism formed by the casing 13, sleeve 15, exter- Iii nally threaded cylinder 18, spring 21 and cap 16 revolves as a single unitaround the central stationary axis extending centrally through the sleeve9 which is secured in a stationary position by means of the bolt 12 and casting 3,1and thereby eliminating any tendency to torsional strain between the spring 21 and any other parts of the mechanism.

It will also be seen that the casing 13 with its cap 16 forms a closed container for oil so that the parts 18, 19 and 15 continually operate in oil. r

What I claim as my invention is: i

1. YA shock absorber for vehicles com prising a stationary member secured to a vehicle frame and forming an axial support, an internal threaded cylindrical casing mounted upon such support to' revolve therea'round, a quadrant formed integral with the casing, aflexible connection ad apted to be secured to the quadrant at one end and to a vehicle axle at the other end, a threaded cylinder engaging the internal thread of the support, connecting means whereby the cylinder is turned by the turning of the casing, and resilient meanscarried within the casing and adapted to resist the outward movement of the threaded cylinder as it is turnedv within the threaded support.

2. A shock absorber for vehicles comprising a supporting internally threaded sleeve member adapted to be secured to a vehicle frame, a casing revolvably mounted upon the sleeve, a quadant formed integral with 3. A shock absorber for vehicles comprising an internally threaded cylindrical support adapt-ed to be secured to a vehicle frame, a cylindrical casing- -mounted upon the support at one end and havinglongitudinally extending ribs at the opposite end, a sleeve provided with longitudinal grooves into which the aforesaid ribs lit and having internal longitudinal grooves, an externally threaded cylinder operating within the internally threaded support, radial projections at the outer end of the cylinder adapted to enter the internal longitudinal grooves of the sleeve, and a spring supported by the casin, movement of the cylinder.

4. A shock absorber for vehicles comprising an internally threaded cylindricalsupport adapted to be secured to a vehicle frame, avcylindrical casing mounted upon the support at one end and having longitudinally extending ribs at the opposite end, a sleeve provided with longitudinal grooves into which the aforesaid ribs fit, an externally threaded cylinder operating within the internally thread-ed support, connecting means between the externally threaded cylinder and the sleeveof the caspermit of the longitudinal movement of the cylinder within thecasing, and a compression spring resisting the outward movement of the cylinder.

v to resist the outwardilongitudinal mg whereby they revolve in unison and yet I In a shock absorber, thecombination with the vehicle body and frame; of acylindrical casing mounted on the frame and turnable around its longitudinal centre, an internally threaded stationary member within the casing, an externally threaded I member meshing with the internally thread ed member and turnable with the casing, a' spring also turnable with the casing and resisting the longitudinal movement of the externally threaded member, and means for imparting a turning movement to the casing 1 to correspond with the movement ofQthe frame and body to and from each other. FRANK WESLEY BULL. 

